Skliros

Skliros (Σκληρός) is a Greek word meaning "hard," "tough," "difficult," "severe," or "strict." The specific nuance depends heavily on the context in which it's used. It can refer to physical hardness, such as the hardness of a material. It can also describe a person's character, implying someone unyielding, uncompromising, or emotionally hardened. Finally, it can relate to situations or circumstances that are demanding and challenging. The word is used in modern Greek and can also appear in loanwords and derivatives used in specialized contexts.